题目内容
--- I saw Helen in the school just now.
--- It ______ be Helen. She has gone to the shopping center with her sister.
A. needn’t B. shouldn’t
C. can’t D. mustn’t
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题目内容
--- I saw Helen in the school just now.
--- It ______ be Helen. She has gone to the shopping center with her sister.
A. needn’t B. shouldn’t
C. can’t D. mustn’t